US2862619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for overcoming reluctance in material which is in process of magnetic separation and concentration
Assignee: Indiana Steel Products Co
•
Filing: 1954-07-08
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Granted: 1958-12-02
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Expires: 1974-07-08
Abstract
No abstract record available.
Inventors
- 👤 Roswell H Stearns
- 👤 Harold W Buus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:25
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/10; B03C1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US487073A
Cited
US791494A
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US944699A
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US832822A
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US1114071A
Cited
AT103310B
Cited
US1965441A
Cited
US1967723A
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US2078513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |